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A kind of welding powder for the anti-wear layer of the water-cooled wall of the circulating fluidized bed boiler

A circulating fluidized bed and wear-resistant plate technology, which is applied in the directions of fluidized bed combustion equipment, cover/lining, fuel burning in a molten state, etc., can solve the problems of poor weldability of wear-resistant plates, etc., and achieve easy welding and good resistance. High temperature oxidation performance and the effect of wide process window

Active Publication Date: 2021-04-27
上海炳晟机电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In order to solve the problem of poor weldability of the existing circulating fluidized bed boiler water wall grid steady flow anti-wear plate, the present invention develops a circulating fluidized bed boiler water wall anti-wear plate anti-wear layer welding powder, which is used for welding Manufacture of easily weldable double-layer structure wear plate

Method used

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  • A kind of welding powder for the anti-wear layer of the water-cooled wall of the circulating fluidized bed boiler

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Effect test

Embodiment 1

[0032] Disclosed is a welding powder for the wear-resistant layer of the water-cooled wall of a circulating fluidized bed boiler, which is composed of the following raw materials in weight percentage: 70% high-carbon ferrochrome, 8% ferroboron, 20% ferronickel and 2% silicon carbide.

[0033] The welding powder can be melted by 120-150A current to form a flat welding layer. The hardness of the cladding layer is about HRC58, and the impact toughness is 4-5J / cm 2 . 900 ℃ 10 hours heat preservation oxidation test, no oxidation weight gain of the sample was detected.

[0034] This embodiment is a high chromium and high nickel formula, which has good wear resistance, corrosion resistance, high temperature oxidation resistance, good toughness, good welding processability, and slightly higher cost.

Embodiment 2

[0036] A circulating fluidized bed boiler water wall anti-wear plate anti-wear layer welding powder, which is composed of the following raw materials in weight percentage: 70% high carbon ferrochrome, 12% ferroboron, 5% ferronickel, 3% silicon carbide and 10 % ferromanganese.

[0037] Welding powder requires 170-200A current to form a smooth cladding layer. The hardness of the cladding layer is HRC60-63, and the impact toughness is 2J / cm 2 about. 900 ℃ 10 hours heat preservation oxidation test, no oxidation weight gain of the sample was detected.

[0038] This embodiment is a high chromium and low nickel formula, which has good wear resistance, high temperature oxidation resistance, good corrosion resistance, good manufacturability and low cost.

Embodiment 3

[0040] A circulating fluidized bed boiler water wall anti-wear plate anti-wear layer welding powder, which is composed of the following raw materials in weight percentage: 65% high carbon ferrochrome, 12% ferroboron, 5% ferronickel, 3% silicon carbide and 15% % ferromanganese.

[0041] The welding powder is melted by 160-180A current to form a flat welding layer. The hardness of the cladding layer is HRC56-58, and the impact toughness is 2-3J / cm 2 . 900 ℃ 10 hours heat preservation oxidation test, no oxidation weight gain of the sample was detected.

[0042] This embodiment is a low-chromium and low-nickel formula, which has good wear resistance, corrosion resistance and high temperature oxidation resistance, good manufacturability and low cost.

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Abstract

The invention discloses a low-cost circulating fluidized bed boiler water wall anti-wear plate anti-wear layer welding powder, which is composed of the following raw materials in weight percentage: 65%-70% high-carbon ferrochrome, 8%-12% boron Iron, 5%-20% ferronickel, 2%-3% silicon carbide and 0-15% ferromanganese, the cladding powder is made of raw material grade powder, the cost is low, and it is used for cladding to manufacture easy-to-weld double-layer structure water cooling The wall anti-wear plate will further promote the application of grid-type steady flow anti-wear technology in the anti-wear of circulating fluidized bed boiler water wall, and improve the service life of circulating fluidized bed boiler water wall.

Description

technical field [0001] The invention relates to the field of circulating fluidized bed boilers, in particular to a welding powder for an antiwear layer of a water cooling wall of a circulating fluidized bed boiler. Background technique [0002] Circulating fluidized bed boilers have the advantages of wide fuel adaptability, high combustion efficiency, wide load adjustment range, low nitrogen oxide emissions, and simple desulfurization, and have developed rapidly in recent years. However, some problems have also been exposed during use, one of which is the severe wear of the water wall caused by the scour of boiling materials. [0003] In order to reduce the wear of water-cooled wall pipe rows, researchers have studied a variety of protection methods, including inorganic refractory protection, anti-wear tile protection, thermal spray protection, surfacing protection, installation of anti-wear beams, and mesh-type steady flow protection. Grind etc. [0004] Grid-type steady ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23M5/08F23C10/18
CPCF23C10/18F23M5/08
Inventor 王保东王鹏崔永强
Owner 上海炳晟机电科技有限公司
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